Re: Big strings => panic

• Date: Fri, 19 Apr 1996 12:58:01 PDT
• From:
  tom@mvision.com (Tom Ritchford)
• Reply-To:
  tom@mvision.com
• In-Reply-To: <Pine.SUN.3.91.960419151713.18721B-100000@ren.us.itd.umich.edu> (message from Christopher Unkel on Fri, 19 Apr 1996 12:23:12 PDT)

>On Fri, 19 Apr 1996, Matthew Sanderson wrote:
>
>> It seems MOO server 1.7.8p4 panics when a string gets extremely long (I'm
>> not sure exactly how long, but I would guess LONG long).
>
>> foo = " ";
>> while(1)
>>   foo = foo + foo;
>>   $command_utils:suspend_if_needed(0);
>> endwhile
>
>It's not a "bug" per se, nor is it something easily fixed.
>
>What happens is simply that when a variable (list or string) gets very 
>large, the server runs out of memory.  (The process hits a process-memory 
>limit, the memory manager is unable to allocate a contiguous block of 
>memory large enough, in extreme cases the swap space is exhausted.)  When 
>the server runs out of memory, it panics -- and in this case probably 
>produces one *very large* panic dump.

This was successfully to deliberately crash our MOO.  Very annoying!

    /t

Tom Ritchford     tom@mvision.com, tom@weirdos.com

Verge's "Little Idiot" -- Music for the mentally peculiar.
1-800-WEIRDOS           http://www.fly.net/~verge

• Re: Big strings => panic
• From: Christopher Unkel <cunkel@us.itd.umich.edu>

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